Valve-block.



Patented Feb. 17, 1914. 2 SHEETS-SHEET 1.

J minnows),

, F. J. DOUGLAS.

VALVE BLOCK. APPLICATION FILED AUG. 2, 1913.

1,087,354, I Patented Feb. 17,1914.

2 SHEETS-SHEET 2.

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FREDERICK J. DOUGLAS, 0F TOPEKA, KANSAS.

VALVE-B140 CK.

ost/35a.

To all whom it may concern Be it known that I, Fmaunnrox J. DOUG- LAS, citizen of the United States, residing at Topeka, in the county of Shawnee and State of Kansas, have invented certain new and useful Improvements in Valve-Blocks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to exhaust control valves for engines and the like and has for its object the production of an efficient valve control for a slide valve.

Another object of the invention is the production of an efiicient means for allowing the valves to slide within the steam chest so as to prevent the same from sticking and becomingjammed.

With the above and other objects in View this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings :-Figure 1 is a horizontal section through a pair of cylinders showing the slide valve working Fig. 2 is a transverse section taken on line 2-2, of Fig. 1. Fig. 3 is a vertical longitudinal section through the slide valve. Fig. a is a detail perspective of the slide valve. Fig. 5 is a plan view of the inner face of the slide valve. Fig. 6 is an enlarged transverse sectional view taken on line 66, of Fig. 1. Fig. 7 is a detail perspective of the operating fingers carried by the slide valve operating rod. Fig. 8 is an enlarged sectional View taken on line 88, of Fig. 5. Fig. 9 is a vertical longitudinal section through the slide valve showing the same mounted upon the steam chest.

By referring to the drawings it will be seen that a pair of cylinders 1 and 2 are provided which are connected by means of an integral steam chest 3. The cylinders 1 and 2 carry the usual reciprocating pistons 4: and 5 which are carried by the piston rods 6 and 7 respectively. A slide valve operating rod 8 is slidably mounted within the steam chest 3 and carries a head 9 central therewith, which head is provided with laterally extending fingers 1 0. The fingers 10 of the head 9 fit between the projecting lips 12 of the sliding valves 13 and move the valves 13 longitudinally of the steam chest 3. These valves 13 fit upon the flat faces of the steam cylinders 1 and 2 as indicated in Specification of Letters Patent.

Application filed August 2, 1913.

. Patented Feb. 1'7, 191%.

Serial No. 782,698.

Fig. 2 and are mounted upon the flanges 14 formed upon the flat faces 15 of the cylinders 1 and 2 as is clearly illustrated. Coil springs 16 are interposed between the slide valves 13 and these coil springs are held in position upon the stub pins 17 carried near the corners of the slide valve 13 as illustrated in Figs. l and 8. These springs 16 will hold the slide valves 13 in frictional engagement with the flat faces 16 with the cylinders l and 2.

Each of the valves 13 is provided with a centrally located steam discharge aperture 19 which aperture communicates with laterally diverging extending passageways 20, and these passageways 20 communicate with vertically extending passageways 21, the passageways 21 being provided with inlet exhaust apertures 22 upon the inner face thereof. These inlet exhaust apertures 22 are adapted to communicate with the exhaust ports 23 of the cylinders 1 and 2 for allowing the exhaust gases or exhaust steam to pass out therethrough and be discharged from the exhaust port or opening 19 formed in the slide valve 13.

From the foregoing description it will be seen that a very eflicient means has been produced for mounting the slide valves in the steam chest of an engine so as to reduce the chances of having the slide valves stick upon the valve seat. These valves 13 are yieldably mounted upon the valve seat and may, therefore, give slightly to overcome any sticking or other means which would tend to hold the valves against proper movement. The valves may be connected to the piston rods in the ordinary manner for the purpose of sliding the same in proper relation to the piston heads a and 5.

The live steam is admitted into the steam chest 25 through a supply pipe 26 and the steam enters the cylinders through the ports 23 when the sliding blocks 13 uncover the ports 23. When the sliding blocks 13 are moved so as to cover one of the ports 23 the other port is opened.

Having thus described the invention what is claimed as new, is

1. A slide valve for a steam engine comprising an elongated body, said body provided with exhaust apertures terminating in laterally extending diverging passageways, said body provided with vertically extending passageways communicating with said last mentioned passageways, said body also provided with discharge apertures communicating with said vertically extending passageways for conveying exhaust steam through said body and discharging the same from the side thereof.

2. An engine of the class described comprising a steam chest, a plurality of slide valves working therein, an operating rod provided with laterally extending fingers, said slide valves provided with laterally extending lips, said fingers fitting between said lips for moving said valves longitudinally of said steam chest, lugs formed upon the corners of said valves, coil springs litting upon said lugs and holding said slide valves in yieldable spaced relation, and said slide valves provided with steam discharge means formed therein.

3. An engine of the class described comprising a. steam chest, a plurality of cylinders, said cylinders provided with exhaust ports formed therein elongated slide valves positioned within said steam chest and provided with apertures adapted to register with said exhaust ports and said cylinders, means for spacing said slide valves, each glide valve provided with diverging passageways, said passageways communicating with the common exhaust port, and means for moving said slide valves longitudinally of said steam chest. I

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

FREDERICK J. DOUGLAS.

l Vitnesses E. D. MAY, Geo. O. ERICSON.

maples of this patent may be obtained for five cents each, by addressing the Commissioner of. Patents. Washington, D. C. 

